DecodeUtils

A collection of useful utility methods for decoding images.

Functions

calculateInSampleSize

fun calculateInSampleSize(@Px srcWidth: Int, @Px srcHeight: Int, @Px dstWidth: Int, @Px dstHeight: Int, scale: Scale): Int

Calculate the BitmapFactory.Options.inSampleSize given the source dimensions of the image (srcWidth and srcHeight), the output dimensions (dstWidth, dstHeight), and the scale.

computePixelSize

fun computePixelSize(srcWidth: Int, srcHeight: Int, dstSize: Size, scale: Scale): PixelSize

Calculate the pixel size required to fit/fill the source dimensions inside the destination size while preserving aspect ratio.

computeSizeMultiplier

fun computeSizeMultiplier(@Px srcWidth: Double, @Px srcHeight: Double, @Px dstWidth: Double, @Px dstHeight: Double, scale: Scale): Double

fun computeSizeMultiplier(@Px srcWidth: Float, @Px srcHeight: Float, @Px dstWidth: Float, @Px dstHeight: Float, scale: Scale): Float

fun computeSizeMultiplier(@Px srcWidth: Int, @Px srcHeight: Int, @Px dstWidth: Int, @Px dstHeight: Int, scale: Scale): Double

Calculate the percentage to multiply the source dimensions by to fit/fill the destination dimensions while preserving aspect ratio.

isAnimatedHeif

fun isAnimatedHeif(source: BufferedSource): Boolean

Return true if the source contains an animated HEIF image sequence. The source is not consumed.

isAnimatedWebP

fun isAnimatedWebP(source: BufferedSource): Boolean

Return true if the source contains an animated WebP image. The source is not consumed.

isGif

fun isGif(source: BufferedSource): Boolean

Return true if the source contains a GIF image. The source is not consumed.

isHeif

fun isHeif(source: BufferedSource): Boolean

Return true if the source contains an HEIF image. The source is not consumed.

isWebP

fun isWebP(source: BufferedSource): Boolean

Return true if the source contains a WebP image. The source is not consumed.